Drug & supplement interaction

Atkins Diet + Opicapone

Opicapone brand name: Ongentys.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Atkins Diet and Opicapone in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.

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Interaction report

Atkins Diet and Opicapone

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Opicapone and Atkins Diet in our sources. This does not guarantee that the combination is completely free of risk — research on Atkins Diet alongside specific medications may be limited.

Atkins Diet is an eating pattern rather than something you take. Ask your pharmacist or doctor before changing how you eat while on a prescribed medicine: some medicines are dosed around meals, and a change in diet can change how they work. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Atkins Diet safety at a glance

Atkins Diet overall Use caution Generally safe for healthy adults short-term, but restrictive and not right for everyone.
Pregnancy Avoid Very low-carb diets are not recommended during pregnancy without medical supervision.
Breastfeeding Use caution Strict carb restriction may not provide enough energy or nutrients while nursing; check with your doctor.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Opicapone and Atkins Diet? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Opicapone

Interactions in our licensed database are recorded against drug classes, not just single drug names. Opicapone is filed under 3 classifications — dopamine agonists, p-glycoprotein substrates, oral drugs. Atkins Diet has documented interactions with 1 drug class — the most serious being antidiabetes drugs (minor) — and none of Opicapone’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Atkins Diet Does Interact With Other Medications

Atkins Diet has 86 minor known drug interactions in our database — Opicapone isn’t one of them. If you take anything else, check it against the full list below.

Minor 86 No known interaction 2,744 (incl. Opicapone)
Taking anything else?

Check Another of Your Medications Against Atkins Diet

Covers the 2,830 medications we’ve checked against Atkins Diet. Pick one to open its full report.

What to actually watch for

What Opicapone’s Own FDA Label Lists

This is not an interaction — none of it involves Atkins Diet. These are the most notable effects listed in the ADVERSE REACTIONS section of Opicapone’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you follow Atkins Diet and take the medicine. 4 of them are worth acting on rather than waiting out — marked below.

  • Hallucinations Worth acting on mentioned in 13.9% of FDA reports for Opicapone
  • Fainting Worth acting on
  • Confusion Worth acting on
  • Raised blood pressure Worth acting on
  • Weight gain
  • Weight loss
  • Dry mouth
  • Low blood pressure
  • Drowsiness
  • Trouble sleeping

Showing the 10 most notable of 12 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Opicapone. Read the label on DailyMed › Where a percentage is shown, it is the share of 2,261 voluntary FDA FAERS reports for Opicapone that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Atkins Diet’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Atkins Diet side to compare — that is a limit of the record, not a statement that Atkins Diet has no side effects.

Everything else you take

See Every Supplement That Interacts With Opicapone

This page covers Atkins Diet only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Opicapone page lists 58 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), St. John's Wort (major), Ayahuasca (moderate), Bitter Melon (moderate) and Black Horehound (moderate).

By severity: 2 major · 39 moderate · 17 minor.

From our pharmacist’s overview on the Opicapone page

“If you take opicapone (Ongentys) alongside levodopa for Parkinson's disease, don't skim this page. Two entries can genuinely undercut your treatment: St.”

Reviewed by 2 · Jul 18, 2026

Open the Opicapone interaction page

How much people look this up

Where Atkins Diet and Opicapone Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Atkins Diet
Steady interest

#1,053 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Opicapone
Top 25%

#663 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Atkins Diet reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Atkins Diet and Opicapone records this page draws on were last updated July 11, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Eating pattern

About Atkins Diet

What is Atkins Diet?

  • Weight loss
  • Blood sugar control
  • Reducing carbohydrate intake
  • Improving certain cholesterol markers
  • Appetite control

The Atkins Diet is a low-carbohydrate eating plan that can help some people lose weight and improve blood sugar in the short term. Long-term results often match other diets, and the plan is restrictive and may not suit everyone. Talk with your doctor or pharmacist before starting, especially if you have diabetes, kidney, or heart concerns.

Not applicable (this is a diet, not an herb) · A low-carbohydrate, higher-protein and higher-fat eating plan with structured phases

An interaction check asks whether these two react with each other — it does not ask whether Atkins Diet is a good idea for someone in your situation. Here is what our Atkins Diet record says about it on its own.

Atkins Diet: dosing

There is no pill or standardized "dose" for the Atkins Diet. Instead, it follows structured phases that start with strict carbohydrate limits and gradually allow more carbs as you reach your goals.The right carbohydrate target varies from person to person. It is best to follow the official program guidance and, ideally, work with a doctor, pharmacist, or registered dietitian to make sure the plan fits your health needs. Drinking enough water and getting enough fiber can help reduce side effects.

From our Atkins Diet monograph — the full record covers uses, side effects and every documented interaction.

Read the full Atkins Diet monograph & all interactions
Medication

About Opicapone

What Is Opicapone Used For?

Brand name: Ongentys

Ongentys (opicapone) is used alongside levodopa/carbidopa to treat Parkinson's disease in adults who experience 'off' episodes — periods when medication wears off and Parkinson's symptoms return before the next dose is due.

It is not used alone. Ongentys works as an add-on to help levodopa stay active longer, reducing the time patients spend in these 'off' states.

Most-Reported Side Effects for Opicapone

From FAERS, the FDA’s public side-effect reporting system (2,261 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Hallucination 314 reports
Dyskinesia 306 reports
Fall 258 reports
On and off phenomenon 158 reports
Tremor 143 reports
See full Opicapone drug information
Keep checking

Other Drugs & Atkins Diet

Browse every other medication we’ve checked against Atkins Diet — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
86Minor
2,743No known interaction
86 Minor 2,743 No interaction
Minor

86 interactions

Showing 60 of 86 minor interactions — see all 86 on the Atkins Diet page.

No interaction 2,743 drugs checked — show the list

We also checked Atkins Diet against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,743 medications checked with no known interaction — see the full Atkins Diet list.

See the full Atkins Diet interactions page
See every supplement checked against Opicapone, ranked by severity
Evidence & sources

Atkins Diet References

The 1 references that drive our Atkins Diet monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Kirkpatrick CF, Bolick JP, Kris-Etherton PM, et al. Review of current evidence and clinical recommendations on the effects of low-carbohydrate and very-low-carbohydrate (including ketogenic) diets for the management of body weight and other cardiometaboli

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Following Atkins Diet While Taking Opicapone: Common Questions

Is it safe to follow Atkins Diet while taking Opicapone?
We do not list a known interaction between Atkins Diet and Opicapone. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
How was the Atkins Diet and Opicapone combination checked?
Interactions in our licensed database are recorded against drug classes. Opicapone is filed under 3 classifications, and Atkins Diet has documented interactions with 1 drug class — none of Opicapone's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Atkins Diet interact with any other medications?
Yes. Atkins Diet has 86 documented drug interactions in our database — Opicapone is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Opicapone interact with any supplements?
Yes. Opicapone has documented interactions with 58 supplements in our database — Atkins Diet is not one of them. The Opicapone interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Atkins Diet monograph Uses, safety profile, and every drug interaction in one place Opicapone drug information The full plain-English guide to this medication Opicapone supplement interactions Every supplement checked against Opicapone, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Opicapone and Atkins Diet?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.